[HN Gopher] Homemade liquid nitrogen generator Joule Thomson thr...
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Homemade liquid nitrogen generator Joule Thomson throttle (2013)
Author : ssutch3
Score : 76 points
Date : 2024-05-07 12:01 UTC (1 days ago)
(HTM) web link (homemadeliquidnitrogen.com)
(TXT) w3m dump (homemadeliquidnitrogen.com)
| dang wrote:
| Related:
|
| _Homemade Liquid Nitrogen Generator_ -
| https://news.ycombinator.com/item?id=23828316 - July 2020 (67
| comments)
| thsksbd wrote:
| kids, be sure not to have your cigarette lit whilst separating N2
| from air.
| cm2187 wrote:
| I love how he used that to try to freeze his cat!
| marcosdumay wrote:
| The cat was (mildly) amused!
| mkaic wrote:
| The YouTube channel Hyperspace Pirate[0] has been consistently
| uploading _fantastic_ videos documenting their attempts to make
| their own homemade liquid nitrogen machine. They don 't shy away
| from including all the technical details, and throw in plenty of
| hilarious deadpan humor too. Highly recommend them if you're
| interested in this topic.
|
| [0]https://www.youtube.com/@HyperspacePirate
| asdfman123 wrote:
| Seconded, it's one of my favorite YouTube channels. He's very
| thorough and the format is entertaining.
| jvanderbot wrote:
| Are those adds from my/our ISP? How does he, someone who seems to
| write html somewhat poorly, manage to get so many intrusive ads
| into this post?
| NotYourLawyer wrote:
| I turned off my adblocker and I see two inline ads, nothing
| crazy. Not sure what you're seeing, but I'm quite sure you
| should install an adblocker.
| jvanderbot wrote:
| Yes, adblocker makes it look like I'd expect. Someone along
| the way is definitely inserting ads, and likely b/c it's
| http://
| crustaceansoup wrote:
| If I stop uBlock and shrink the window / enlarge the text so
| only the main column fits, there's only two inline ads. At
| normal desktop size though, there's also two sidebar ads and
| one overlapping box at the bottom. And the ones I got move.
|
| They look like legit AdSense ads, and there's a
| "liquidnitrogen" comment on one of the related scripts.
| avmich wrote:
| The overall quality of this website I'd estimate at least in
| top 5% of all Web, if not top 1%. The content is superb, the
| presentation is quite clear.
| jvanderbot wrote:
| I was not referring to the content or quality of the page,
| just the technical sophistication of the presentation, which
| is at odds with the number of invasive popup ads. It just
| doesn't seem to be the type of site that would do that, yet
| here I am with 4 separate banner ads and a popup.
| DistractionRect wrote:
| It's an http page, so your ISP//any hop along the way is free
| to insert anything they want or completely rewrite the content
| as they wish.
| nullc wrote:
| I wonder if in the time since this was written if anyone has
| found a good source for small turbo expanders.
|
| Liquefied air is a potentially interesting mode of energy storage
| for islanded solar because it doesn't require high pressure
| storage (which has safety concerns)-- for that application the
| round trip efficiency isn't critical as there is nothing else to
| do with the power... but it can't be a total joke. And the basic
| JT cycle is really poor. I understand that simply adding an
| expander and another heat exchange stage can improve it a lot.
| sandworm101 wrote:
| If you are dealing with liquid nitrogen from air, then you are
| probably also dealing with liquid oxygen in the mix. I imaging
| that at power-storage scales the presence of such amounts of
| liquid oxygen might create safety issues. Separating it out
| might nullify any energy storage advantages.
| 0cf8612b2e1e wrote:
| You could embed the chiller in a nitrogen only environment. I
| am imagining a closed loop system where you are cooling/using
| the nitrogen on a daily basis.
| nullc wrote:
| It's not all that energetically disfavorable to extract
| oxygen if you're already compressing the gas. There is a lot
| of demand for concentrated oxygen too, so one could
| manufacture it as a side product instead of storing it.
|
| As far as 'closed loop' sadly that does break the economics,
| I think-- part of the reason why cryogenic nitrogen storage
| is interesting is because the nitrogen expands 800 fold at
| atmospheric pressure, so the container for the decompressed
| nitrogen would be gigantic.
| voakbasda wrote:
| I would wager that the regulations governing LO2 generation
| facilities preclude pursuing that as a side product. I
| imagine lots of red tape, either already in place or coming
| soon -- right after someone blows up their neighborhood
| trying.
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